Somfy Simu DMI5 35Nm Crank Override Motor Fit Guide

A rolling shutter with no hand crank traps the owner during a power cut. Somfy builds the Simu DMI5 line for that case. Reference 2000771, the DMI5 35Nm 18rpm 120V, carries a crank override inside the motor head. A pole and a hex shaft turn the tube when the grid drops. Installers reach for it on storefront shutters and wide awnings where a jammed slat pack costs the owner a day of trade.

Torque sets the ceiling here. 35 Nm moves a heavier shutter curtain than the smaller refs in the same body, and 18 rpm keeps travel time short on a tall opening. Buyers who need more pick the 40 Nm DMI5. Buyers hanging a light aluminium curtain save money on the 20 Nm and 25 Nm versions.

Shutters and awnings the 35 Nm DMI5 drives

Somfy publishes the DMI5 for rolling shutters and awnings. The 35 Nm rating suits an extruded aluminium shutter on a commercial front, a security shutter over a wide window, a folding-arm awning carrying heavy acrylic fabric, and a patio roller awning on a long run. Curtain weight per square foot and drum diameter drive the real calculation, so measure the curtain and read the Somfy torque chart before you order.

The crank override earns its place on any opening the owner must move without power. Fire exits behind a shutter and loading bays both qualify. The 27:1 reduction inside the head turns the crank many times for each tube revolution, which holds hand force down on a heavy curtain. Somfy fits the override socket for 6mm and 7mm hardware, so standard Simu crank gear mates to it.

Verified specs for reference 2000771

Specs verified against Somfy's published data for reference 2000771 on somfysystems.com.

Tube, crown, and drive fit

The DMI5 shares the 50mm body and output pattern Somfy uses across the T5 and LT50 range, so crowns and drives already on your shelf carry over. A 70mm octagonal tube takes the T5/T6 70mm octagonal aluminum drive (9011878). A 60mm round Simbac tube takes the 9420300 wheel. For a 2 inch or 2.5 inch round tube, LT50 soft clip drives 9206089 and 9206041 seat on the same output.

Order the crown and the drive as a pair that matches one tube profile. A 60mm octagonal crown on a 70mm tube leaves the motor floating, and the slop shows up as noise inside six months of cycling. Check the tube wall thickness too. Thin-wall shutter tube wants the drive Somfy specifies for that gauge, not the nearest diameter.

Brackets and the crank side

Somfy builds a family of DMI plates for this head. The 1-piece round adjustable cast plate (9420647) bolts to a flat face and gives the installer rotation to square the motor against the tube. The 2-piece inside mount adjustable U (2005701) drops the motor inside a shutter box where the face carries no room for a plate. A 100mm x 100mm plate, reference 9706034, covers a wider mounting pad on masonry.

The crank side needs a path from the override socket out to the pole. The 7mm hex extension shaft, 330mm (9420659) carries the drive through a shutter box wall or a soffit to a point the owner can reach. Measure from the override fitting to the finished face before you pick a shaft length. Confirm the fitting on the motor you receive against the shaft you order.

Wiring and limit setup

2000771 runs on a wired circuit. The motor takes 120V/60Hz through its cable and answers a standard up and down switch or a dry contact relay in a shutter panel. Plan one switch per motor, or group several motors behind a relay module when the owner wants a single command for a row of shutters. Standby draw sits at 0 W, so a bank of DMI5 motors adds nothing to the idle load.

Limits sit on the motor head as progressive mechanical screws. Drive the shutter to the closed position, set the down screw, run it open, set the up screw, then cycle the shutter twice to confirm both stops hold. The head accepts 28 turns of travel. Count tube revolutions against curtain drop before you commit to a tube diameter, because a small tube burns turns fast on a tall opening.

IP 44 covers splashing water from any direction, which suits a shutter box on an exterior wall. Keep the cable gland and the motor head out of standing water, and route the cable so rain runs away from the entry.

Build the shutter around it

The Somfy Simu DMI5 35Nm 18rpm 120V (2000771) gives a commercial shutter the torque for a heavy curtain and gives the owner a crank for the day the power goes. Pair it with the bracket that matches your box, the drive that matches your tube, and a shaft long enough to reach the crank point. Somfy backs the motor for 5 years.

Frequently asked questions

What does the manual override on the Simu DMI5 do?

The override gives the owner a mechanical path to the tube. A crank handle engages the 6mm or 7mm fitting on the motor head, and a 27:1 reduction inside the head turns the tube under hand power. The shutter opens and closes with no electricity, which matters on a storefront or a fire exit.

Will the DMI5 35 Nm fit a 70 mm octagonal tube?

Yes. Somfy's T5/T6 70mm octagonal aluminum drive, reference 9011878, mates to the DMI5 output. Pair it with the matching 70mm crown at the idler end. For round Simbac tube, use the 85mm wheel 9420300, and for 2 inch or 2.5 inch round tube, use the LT50 clip drives.

How many turns of travel does reference 2000771 hold?

The progressive mechanical end-limits on the head carry 28 turns. Divide your curtain drop by the circumference of the loaded tube to get the turns your opening needs, then add two for setup margin. A larger tube diameter uses fewer turns for the same drop.

Does 2000771 work with a Somfy radio remote?

2000771 answers wired control. Somfy builds the Simu DMI5Hz line for radio operation, with the same crank override and a built-in 433.420 MHz receiver, so a handheld transmitter runs the shutter. Pick the DMI5Hz reference at your torque rating when the job calls for remote control.

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